My 86 year old mother has lost 40 lb in the last 6 months from 160lb to 120 lb. The Geriatric Doctors have done tests but no conclusions. They ruled out thyroid , she took an MRI and they had her take an electrocardiagram She is slightly anemic. She occasionally gets tremors in hands. She is on 10 mb lisinipril per day. Im worried she may have cancer. Are there any other tests that can be done?